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Regarding L6585D/DE Based Design

Question asked by Vilas Parte on May 29, 2010
Latest reply on Jul 28, 2010 by Vipin Bothra
One of Our Client Facing following Problem :

1.      IN PRODUCTION & TESTING Ballast PCB Board(24W, PRODUCT) USING L6585D/L6585DE WORKS FINE.

2.      BUT, IF CUSTOMER KEEP THIS PCB Board IN STORE FOR 1-2 WEEKS. And after Couple of weeks if he tried to use these boards for Assembly, CUSTOMER FACING FOLLOWING PROBLEMS :

A.     SOME BALLAST PCB SWITCHES ON AND OFF AFTER 3-4 SECONDS.

B.     SOME BALLAST PCB DOESN’T WORKING.

C.     SOME L6585D/DE SHOW PIN NO. 17(VCC) & 18(OUT) SHORTED.

D.     SOME L6585D/DE SHOW PIN NO.15(GND) & 17(VCC) SHORTED.

E.      REJECTION IS AROUND 25-30%.

F.       Problem is not same for all L6585D/DE, it varies Ballast to Ballast.

G.     If he done production and assembly at the same time, problem  arises in couple of weeks in the same manner.

3.      BUT, IN ANY CASE IF WE REPLACE L6585D/L6585DE BY NEW ONE BALLAST WORKS FINE.(AND AFTER THAT IF WE KEEP IT IN STORE, CYCLE/PROBLEM REPEATS AFTER FEW DAYS.)

 Accoring to client, this is Problem arises due to static effect.

Kindy Guide if You have Solution.


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